Volume 74, Issue 3 pp. 1251-1270
Original Article

TNF-α-Induce Protein 8–Like 1 Inhibits Hepatic Steatosis, Inflammation, and Fibrosis by Suppressing Polyubiquitination of Apoptosis Signal–Regulating Kinase 1

Hong Wu

Hong Wu

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

These authors contributed equally to this work.Search for more papers by this author
Xiaolei Xu

Xiaolei Xu

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

These authors contributed equally to this work.Search for more papers by this author
Ancheng Zheng

Ancheng Zheng

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

These authors contributed equally to this work.Search for more papers by this author
Weina Wang

Weina Wang

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China

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Li Mei

Li Mei

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

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Yue Chen

Yue Chen

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

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Shasha Sun

Shasha Sun

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

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Liujun Jiang

Liujun Jiang

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

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Yutao Wu

Yutao Wu

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

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Yijiang Zhou

Yijiang Zhou

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

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Min Zheng

Corresponding Author

Min Zheng

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China

ADDRESS CORRESPONDENCE AND REPRINT REQUESTS TO:

Qishan Chen, Ph.D., M.D.

Department of Cardiology

The First Affiliated Hospital

School of Medicine

Zhejiang University

79 Qingchun Road

Hangzhou 310000, China

E-mail: [email protected]

Tel.: +571-87236114

or

Min Zheng, Ph.D.

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases

The First Affiliated Hospital

School of Medicine

Zhejiang University

79 Qingchun Road

Hangzhou 310000, China

E-mail: [email protected]

Tel.: +571-87236608

Search for more papers by this author
Qishan Chen

Corresponding Author

Qishan Chen

Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China

ADDRESS CORRESPONDENCE AND REPRINT REQUESTS TO:

Qishan Chen, Ph.D., M.D.

Department of Cardiology

The First Affiliated Hospital

School of Medicine

Zhejiang University

79 Qingchun Road

Hangzhou 310000, China

E-mail: [email protected]

Tel.: +571-87236114

or

Min Zheng, Ph.D.

The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases

The First Affiliated Hospital

School of Medicine

Zhejiang University

79 Qingchun Road

Hangzhou 310000, China

E-mail: [email protected]

Tel.: +571-87236608

Search for more papers by this author
First published: 13 March 2021
Citations: 3
Supported by grants from the National Natural Science Foundation of China (81570249, 91539103, 81470581, 81871646, and 81700240) and the Zhejiang Provincial Natural Science Foundation (LD18H020001 and LR20H020001).
Potential conflict of interest: Nothing to report.

Abstract

Background and Aims

Characterized by hepatocyte steatosis, inflammation, and fibrosis, NASH is a complicated process that contributes to end-stage liver disease and, eventually, HCC. TNF-α-induced protein 8–like 1 (TIPE1), a new member of the TNF-α-induced protein 8 family, has been explored in immunology and oncology research; but little is known about its role in metabolic diseases.

Approach and Results

Here, we show that hepatocyte-specific deletion of TIPE1 exacerbated diet-induced hepatic steatosis, inflammation, and fibrosis as well as systemic metabolic disorders during NASH pathogenesis. Conversely, hepatocyte-specific overexpression of TIPE1 dramatically prevented the progression of these abnormalities. Mechanically, TIPE1 directly interacted with apoptosis signal–regulating kinase 1 (ASK1) to suppress its TNF receptor–associated factor 6 (TRAF6)–catalyzed polyubiquitination activation upon metabolic challenge, thereby inhibiting the downstream c-Jun N-terminal kinase and p38 signaling pathway. Importantly, dramatically reduced TIPE1 expression was observed in the livers of patients with NAFLD, suggesting that TIPE1 might be a promising therapeutic target for NAFLD and related metabolic diseases.

Conclusions

TIPE1 protects against hepatic steatosis, inflammation, and fibrosis through directly binding ASK1 and restraining its TRAF6-catalyzed polyubiquitination during the development of NASH. Therefore, targeting TIPE1 could be a promising therapeutic approach for NAFLD treatment.

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